attachments to proposed changes...black text – original text red text – modified or added text....

National Green Building Standard™

2018 UPDATE

Attachments to Proposed Changes April 13, 2018

P034 – Chapter 11 Rewrite ............................................................................................................. 1

Guide to Edits: ................................................................................................................................. 1

Edits to Chapter 3: .......................................................................................................................... 1

Edits to Chapter 11: ........................................................................................................................ 3

Edits to Chapter 12 ......................................................................................................................... 8

P042 – Production Builders ............................................................................................................. 9

P044 – Commercial Spaces New Construction ............................................................................. 20

P538 – Whole Dwelling Ventilation .............................................................................................. 27

2018 NGBS UPDATE 1 April 13, 2018

P034 – Chapter 11 Rewrite

Guide to Edits:

In order to save space, only Section number and titles are shown. If only the section number and title are shown, no edits were performed to that section. If a new section was added to Chapter 11 and only the section number and title are shown, then that section was copied verbatim from corresponding section in previous chapter. All other edits shown in red. Black Text – Original Text Red Text – Modified or Added Text.

Edits to Chapter 3:

304 GREEN MULTIFAMILY BUILDINGS 304.1 Multifamily buildings.

305 GREEN REMODELING 305.1 Compliance.

305.2 Compliance options. The criteria for existing buildings shall be in accordance with Section 305.3 for whole-

building ratings or Section 305.4 for compliance designations of building functional areas.

305.3 Whole-building rating criteria

305.3.1 Applicability. The provisions of Section 305.3 shall apply to remodeling of existing buildings. In addition to the foundation, at least 50 percent of the structural systems of the existing building shall remain in place after the remodel for the building to be eligible for compliance under Section 305.3. Recent new construction projects are not eligible for verification under the remodel path. The Certificate of Occupancy date must be at least five years prior to the registration of a remodel project.

305.3.1.1 Additions.

305.3.2 Rating scope.

305.3.3 Mandatory practices. The building, including any additions and common areas, shall satisfy all practices designated as mandatory in Chapter 11 Additions, alterations or repairs to an existing building, building system or portion thereof shall comply with the Mandatory requirements in Chapter 11. Unaltered portions of the existing building or building supply system shall not be required to meet Mandatory requirements except when life safety or apparent moisture issues exist. 305.3.4 Rating level 305.3.5 Energy Efficiency. The energy efficiency rating level shall be based on the reduction in energy consumption resulting from the remodel in accordance with Table 305.3.5.The building shall comply with Section 11.305.3.5.1 or 11.305.3.5.2: 305.3.5.1 Energy Consumption Reduction Path: The energy efficiency rating level shall be based on the reduction in energy consumption resulting from the remodel in accordance with Table 305.3.5.1

Table 305.3.5.1 Energy Rating Reduction Level Thresholds

Rating Level

BRONZE SILVER GOLD EMERALD

Reduction in energy consumption 15% 25% 35% 45%

The reduction in energy consumption resulting from the remodel shall be based on the estimated annual energy cost savings or source energy savings as determined by a third-party energy audit and analysis or utility consumption data. The reduction shall be the percentage difference between the consumption per square foot before and after the remodel calculated as follows:

[(consumption per square foot before remodel – consumption per square foot after remodel)/consumption per

square foot before remodel]∗100


The occupancy and lifestyle assumed and the method of making the energy consumption estimates shall be the same for estimates before and after the remodel. The building configuration for the after-remodel estimate shall include any additions to the building or other changes to the configuration of the conditioned space. For multifamily buildings, the energy consumption shall be based on the entire building including all dwelling units and common areas.

If a building can demonstrate through documentation approved by the Adopting Entity that the remodel activities started prior to project registration, the energy baseline (consumption per square foot before remodel) can be calculated based on data and building systems that existed in the building up to 3 years prior project registration.

305.3.5.2 Prescriptive Path: The building shall comply with Table 305.3.5.2 (Energy Rating Prescriptive Point Thresholds). Any practice listed in Section.11.703 shall be eligible for contributing points toward Table 305.3.5.2 (Energy Rating Prescriptive Point Thresholds). The attributes of the existing building that were in compliance with the prescriptive practices of in Section.11.703 prior to the remodel and remain in compliance after the remodel shall be eligible for contributing points to this section.

Table 305.3.5.2 Energy Rating Prescriptive Point Thresholds

Rating Level


Section 11.703 prescriptive thresholds

30 45 60 70

Points from Section 11.703 and 11.705 do not count towards the total points for section 11.305.3.7 305.3.6 Water efficiency. The water efficiency rating level shall be based on the reduction in water consumption resulting from the remodel in accordance with Table 305.3.6. The building shall comply with Section 11.305.3.6.1 or 11.305.3.6.2: 305.3.6.1 Water Consumption Reduction Path: The water efficiency rating level shall be based on the reduction in water consumption resulting from the remodel in accordance with Table 305.3.6.1

Table 305.3.6.1 Water Rating Reduction Level Thresholds

Rating Level


Reduction in water consumption 20% 30% 40% 50%

Water consumption shall be based on the estimated annual use as determined by a third-party audit and analysis or use of utility consumption data. The reduction shall be the percentage difference between the consumption before and after the remodel calculated as follows:

[(consumption before remodel − consumption after remodel)/consumption before remodel]∗100%

The occupancy and lifestyle assumed and the method of making the water consumption estimates shall be the same for estimates before and after the remodel. The building configuration for the after-remodel estimate shall include any changes to the configuration of the building such as additions or new points of water use. For multifamily buildings, the water consumption shall be based on the entire building including all dwelling units and common areas.

If a building can demonstrate through documentation approved by the Adopting Entity that the remodel activities started prior to project registration, the water baseline (consumption before remodel) can be calculated based on data and building systems that existed in the building up to 3 years prior project registration 305.3.6.2. Prescriptive Path: The building shall comply with Table 305.3.6.2 (Water Rating Prescriptive Point Thresholds). Any practice listed in Section.11.801 shall be eligible for contributing points toward Table 305.3.6.2 (Water Rating Prescriptive Point Thresholds). The attributes of the existing building that were in compliance with the prescriptive practices of in Section.11.801 prior to the remodel and remain in compliance after the remodel shall be eligible for contributing points to this section.


Table 305.3.6.2 Water Rating Prescriptive Point Thresholds

Rating Level


Section 11.800 prescriptive thresholds

25 39 67 92

305.3.7 Prescriptive practices. The point thresholds for the environmental rating levels based on compliance with the Chapter 11 prescriptive practices shall be in accordance with Table 305.3.7. Any practice listed in Chapter 11, except for 11.700 and 11.800, shall be eligible for contributing points to the prescriptive threshold ratings. The attributes of the existing building that were in compliance with the prescriptive practices of Chapter 11 prior to the remodel and remain in compliance after the remodel shall be eligible for contributing points to the prescriptive threshold ratings.

Table 305.3.7 Prescriptive Threshold Point Ratings

Rating Level


Chapter 11 prescriptive thresholds 88 125 181 225

Delete Section 305.4 entirely 305.4.1 Applicability.

305.4.1.1 Additions.

305.4.2 Compliant.

305.4.3 Designation.

305.4.4 Additions.

305.4.5 Mandatory

305.4.6 Existing attributes. 306 GREEN ACCESSORY STRUCTURES 306.1 Applicability. 306.2 Compliance

Edits to Chapter 11:

CHAPTER 11 REMODELING 11.500 LOT DESIGN, PREPARATION, AND DEVELOPMENT

11.500.0 Intent 11.501 LOT SELECTION

11.501.2 Multi-modal transportation 11.502 PROJECT TEAM, MISSION STATEMENT, AND GOALS

11.502.1 Project team, mission statement, and goals 11.503 LOT DESIGN

11.503.0 Intent 11.503.1 Natural resources 11.503.2 Slope disturbance 11.503.3 Soil disturbance and erosion 11.503.4 Stormwater Management 11.503.5 Landscape plan 11.503.6 Wildlife habitat 11.503.7 Environmentally sensitive areas

11.504 LOT CONSTRUCTION 11.504.0 Intent


11.504.1 On-site supervision and coordination 11.504.2 Trees and vegetation 11.504.3 Soil disturbance and erosion implementation

11.505 INNOVATIVE PRACTICES 11.505.0 Intent 11.505.1 Driveways and parking areas 11.505.2 Heat island mitigation 11.505.3 Density 11.505.4 Mixed-use development 11.505.5 Community Garden(s) 11.505.6 Multi-unit plug-in electric vehicle charging

11.601 QUALITY OF CONSTRUCTION MATERIALS AND WASTE 11.601.0 Intent 11.601.1 Conditioned floor area 11.601.2 Material usage 11.601.3 Building dimensions and layouts 11.601.4 Framing and structural plans 11.601.5 Prefabricated components 11.601.6 Stacked stories 11.601.7 Prefinished materials 11.601.8 Foundations

11.602 ENHANCED DURABILITY AND REDUCED MAINTENANCE 11.602.0 Intent 11.602.1 Moisture management – building envelope 11.602.2 Roof surfaces 11.602.3 Roof water discharge 11.602.4 Finished grade

11.603 REUSED OR SALVAGED MATERIALS 11.603.0 Intent 11.603.1 Reuse of existing building 11.603.2 Salvaged materials 11.603.3 Scrap materials

11.604 RECYCLED-CONTENT BUILDING MATERIALS 11.604.1 Recycled content

11.605 RECYCLED CONSTRUCTION WASTE 11.605.0 Intent 11.605.1 Hazardous waste 11.605.2 Construction waste management plan 11.605.3 On-site recycling 11.605.4 Recycled construction materials

11.606 RENEWABLE MATERIALS 11.606.0 Intent 11.606.1 Biobased products 11.606.2 Wood-based products 11.606.3 Manufacturing energy

11.607 RECYCLING AND WASTE REDUCTION 11.607.1 Recycling and composting 11.607.2 Food waste disposers

11.608 RESOURCE-EFFICIENT MATERIALS 11.608.1 Resource-efficient materials

11.609 REGIONAL MATERIALS 11.609.1 Regional materials

11.610 LIFE CYCLE ASSESSMENT 11.610.1 Life cycle assessment 11.610.1.1 Whole-building life cycle assessment 11.610.1.2 Life cycle assessment for a product or assembly

11.611 INNOVATIVE PRACTICES 11.611.1 Manufacturer’s environmental management system concepts


11.611.2 Sustainable products 11.611.3 Universal design elements 11.611.4 Product declarations

11.701 MINIMUM ENERGY EFFICIENCY REQUIREMENTS 11.701.4 Mandatory practices 11.701.4.0 Minimum energy efficiency requirements 11.701.4.1 HVAC systems 11.701.4.2 Duct systems 11.701.4.3 Insulation and air sealing

11.701.4.4 High-efficacy lighting Lighting efficacy in dwelling units is in accordance with one of the following:

1) A minimum of 7590 percent of the total hard-wired lighting fixtures or the bulbs in those fixtures

qualify as high efficacy or equivalent

2) Lighting power density, measured in watts/square foot, is 1.1 or less.

11.701.4.5 Boiler supply piping 11.701.4.6 Fenestration specifications 11.701.4.7 Replacement fenestration

11.703.1 Mandatory Practices 11.703.1.1 UA Compliance The building thermal envelope is in compliance with Section 11.703.1.1.1 or 11.703.1.1.2. Exception: Section 11.703.1.1 is not required for Tropical Climate Zone. 11.703.1.1.1 Maximum UA. For IECC residential, the total building UA is less than or equal to the total maximum UA as computed by 2015 2018 IECC Section R402.1.5. For IECC commercial, the total UA is less than or equal to the sum of the UA for 2015 2018 IECC Tables C402.1.4 and C402.4, including the U-factor times the area and C-factor or F-factor times the perimeter. The total UA proposed and baseline calculations are documented. REScheck or COMcheck is deemed to provide UA calculation documentation. 11.703.1.1.2 Prescriptive R-value and fenestration requirements. The building thermal envelope is in accordance with the insulation and fenestration requirements of 2015 2018 IECC R502.1.1.1Table R402.1.1 or Tables C402.1.3 and C402.4. The SHGC is in accordance with the 2015 2018 IECC requirements. 11.703.1.2 Building Envelope Leakage. The building thermal envelope is in accordance with 2015 2018 IECC R402.4.1.2 or C402.5 R502.1.1.1 or R503.1.1 as applicable. Exception: Section 11.703.1.2 is not required for Tropical Climate Zone. 11.703.1.3 Duct Testing. The duct system is in accordance with 2015 2018 IECC R403.3.2 through R403.3.5 as applicable.

11.703.2 Building envelope 11.703.2.1 UA improvement 11.703.2.2 Mass walls 11.702.3 11.703.2.4 Building envelope leakage

11.703.2.5 Fenestration 11.703.2.5.1 11.703.2.5.1.1 Dynamic Glazing 11.703.2.5.2 11.703.2.5.2.1 Dynamic glazing

11.703.3 HVAC equipment efficiency 11.703.3.0 Multiple heating and cooling systems 11.703.3.1 11.703.3.2 11.703.3.3 11.703.3.4 11.703.3.5 11.703.3.6 11.703.3.7 11.703.3.8

11.703.4 Duct Systems 11.703.4.1 11.703.4.2


11.703.4.3 11.703.4.4 Duct Leakage

11.703.5 Water Heating System 11.703.5.1 11.703.5.2 11.703.5.3 11.703.5.4 11.703.5.5 Solar water heater

11.703.6 Lighting and appliances 11.703.6.1 Hard-wired lighting 11.703.6.2 appliances

11.703.7 Passive Solar Design 11.703.7.1 Sun tempered design 11.703.7.2 window shading 11.703.7.3 passive cooling design 11.703.7.4 passive solar heating design

11.705 Additional practices 11.705.1 Application of additional practice points. Points from Section 11.705 can be added to points earned in Section 702 (Performance Path), Section 11.703 (Prescriptive Path), Section 704 (HERS Index Target Path), or Section 701.1.4 (alternative bronze and silver level compliance). 11.705.2 Lighting 11.705.2.1 Lighting controls 11.705.2.1.1 Interior lighting 11.705.2.1.2 Exterior lighting 11.705.2.1.3 multifamily common areas 11.705.2.1.4 11.705.2.2 TDDs and skylights 11.705.2.3 lighting outlets 11.705.2.4 recessed luminaries 11.705.3 induction cooktop 11.705.4 return ducts and transfer grilles 11.705.5 HVAC design and installation 11.705.5.1 11.705.5.2 11.705.6 installation and performance verification 11.705.6.1 11.705.6.2 Testing 11.705.6.2.1 air leakage validation of building or dwelling units 11.705.6.2.2 HVAC airflow testing 11.705.6.2.3 HVAC duct leakage testing 11.705.6.3 insulating hot water pipes 11.705.6.4 potable hot water demand re-circulation system 11.705.6.4.1 11.705.6.4.2 11.705.7 submetering system

11.706 innovation practices 11.706.1 energy consumption control 11.706.2 renewable energy service plan 11.706.3 smart appliance and systems 11.706.4 pumps 11.706.4.1 11.706.4.2 11.706.5 on-site renewable energy system 11.706.6 parking garage efficiency 11.706.7 grid-interactive electric thermal storage system 11.706.8 electrical vehicle charging station 11.706.9 automatic demand response

11.801 Indoor and outdoor water use


11.801.0 intent 11.801.1 indoor hot water usage 11.801.2 water-conserving appliances 11.801.3 showerheads 11.801.4 lavatory faucets 11.801.4.1 11.801.4.2 11.801.5 water closets and urinals 11.801.6 irrigation systems 11.801.6.1 11.801.6.2 11.801.6.3 11.801.6.4 11.801.6.5 11.801.7 rainwater collection and distribution 11.801.7.1 11.801.7.2 11.801.8 sediment filters

11.802 innovation practices 11.802.1 reclaimed gray, or recycled water 11.802.2 reclaimed water, greywater or rainwater pre-piping 11.802.3 automatic shutoff water devices 11.802.4 engineered biological system or intensive bioremediation system 11.802.5 recirculating humidifier 11.802.6 advanced wastewater treatment system

11.901 POLLUTANT SOURCE CONTROL 11.901.0 Intent 11.901.1 Space and water heating options 11.901.2 Solid fuel-burning appliances 11.901.3 Garages 11.901.4 Wood materials 11.901.5 Cabinets 11.901.6 Carpets 11.901.7 Floor materials 11.901.8 Wall coverings 11.901.9 Interior architectural coatings 11.901.10 Interior Adhesives and sealants 11.901.11 Insulation 11.901.12 Carbon monoxide (CO) alarms 11.901.13 Building entrance pollutants control 11.901.14 Non-smoking areas 11.901.15 Lead-safe work practices

11.902 POLLUTANT CONTROL 11.902.0 Intent 11.902.1 Spot ventilation 11.902.2 Building ventilation systems 11.902.3 Radon control 11.902.4 HVAC system protection 11.902.5 Central vacuum systems 11.902.6 Living space contaminants

11.903 MOISTURE MANAGEMENT: VAPOR, RAINWATER, PLUMBING, HVAC 11.903.0 Intent 11.903.1 Plumbing 11.903.2 Duct insulation 11.903.3 Relative humidity

11.904 INDOOR AIR QUALITY 11.904.0 Intent 11.904.1 Indoor Air Quality (IAQ) during construction


11.904.2 Indoor Air Quality (IAQ) post completion 11.905 INNOVATIVE PRACTICES

11.905.1 Humidity monitoring system 11.905.2 Kitchen exhaust

11.1001 HOMEOWNER’S MANUAL AND TRAINING GUIDELINES FOR ONE- AND TWO-FAMILY DWELLINGS 11.1001.0 Intent 11.1001.1 Homeowner’s manual 11.1001.2 Training of initial building owners

11.1002 CONSTRUCTION, OPERATION, AND MAINTENANCE MANUALS AND TRAINING FOR MULTIFAMILY BUILDINGS

11.1002.0 Intent 11.1002.1 Building construction manual 11.1002.2 Operations manual 11.1002.3 Maintenance manual 11.1002.4 Training of building owners

11.1003 PUBLIC EDUCATION 11.1003.0 Intent 11.1003.1 Public Education

11.1005 INNOVATIVE PRACTICES

Edits to Chapter 12

Delete Chapter 12 entirely CHAPTER 12 Remodeling of Functional Areas


P042 – Production Builders

New CHAPTER XX: Alternative Bronze Compliance Path for SF Homes, Townhomes, and Duplexes

303 Green Buildings 303.1 Compliance options. The criteria for new buildings shall be in accordance with Section 303.2 for

residential buildings, the residential portion of mixed use buildings, or mixed-use buildings or Section 303.3 for

compliance for single family homes, townhomes, and duplexes.

303.2 Green Buildings (remains the same)

(1) Xx

(2) Xx

(3) xx

303.3 Green Single-family homes, townhomes, and Duplexes. Single-family homes, townhomes, and

duplexes that meet all applicable requirements of Chapter 13 shall earn the Bronze certification level.

13.00 Substitution of practices. The adopting entity shall be permitted to substitute one or more practices with

alternatives that achieve the overall intent of this standard. The determination of intent and equivalency is in the

purview of the adopting entity.

LOT DEVELOPMENT Floodplain. Construction shall not occur in a floodplain or construction shall be elevated above the floodplain.

Lot Slope. Finished grade at all sides of a building shall be sloped to provide a minimum of 6 inches (150 mm)

of fall within 10 feet (3048 mm) of the edge of the building. Where lot lines, walls, slopes, or other physical

barriers prohibit 6 inches (152 mm) of fall within 10 feet (3048 mm), the final grade shall be sloped away from

the edge of the building at a minimum slope of 2 percent.

Soil preparation for new plants. Soil shall be tilled or new soil shall be added down 6” for new plants and

12” for new trees. Soil shall be amended with organic matter, such as mulch or compost, as needed. Long

acting sources of nutrients shall be added if the soil is deficient.

Regionally Appropriate Vegetation. Where the jurisdiction that has authority has developed a specification

for non-invasive vegetation that is native or appropriate for local growing conditions vegetation from that

specification is selected for landscaping.

Regionally Appropriate Vegetation. Where the When an Agency that has jurisdiction that has authority has

developed a specification for planting, including for non-invasive vegetation that is native or appropriate for

local growing conditions, vegetation from that specification is selected for the landscaping plan and that

landscaping is installed. Soil preparation for new plants. Soil shall be tilled or new soil shall be added down 6” for new plants and

12” for new trees. Soil shall be amended with organic matter, such as mulch or compost, as needed. Long

acting sources of nutrients shall be added if the soil is deficient. The landscaping plan shall incorporate the

jurisdictional Department of Transportation (DOT) specifications (or equal) for soil preparation and

amendment for landscape planning. If regional conditions provide an alternative for planting (for instance,

in drought or water challenged areas) that alternative shall be REQUIRED as a part of the landscape plan.

NEW-Protection of Natural Resources: Any trees or other natural resources that do not conflict with the

home construction or finished grading and drainage of the lot and adjacent lots shall be properly protected

during construction and all controls shall be removed following construction. The landscape plan shall

contain details for the protection and instructions for incorporation of the trees/areas into the final

landscape plan.

RESOURCE EFFICIENCY (Durability)


Capillary Break. A capillary break and vapor retarder shall be installed at concrete slabs in accordance with

IRC Sections R506.2.2 and R506.2.3.

Foundation drainage. Where required by the IRC for habitable and usable spaces below grade, exterior drain

tile shall be installed.

Dampproof walls shall be provided below finished grade.

Sealed crawlspace. 6-mil polyethylene sheeting, or other Class I vapor retarder shall be installed in accordance

with Section 408.3 or Section 506 of the International Residential Code.

Dry Insulation. Insulation in cavities shall be dry in accordance with manufacturer’s instructions when

enclosed before enclosing (e.g., with drywall).

Water-resistive barrier. Where required by the IRC, or IBC, a water-resistive barrier and/or drainage plane

system shall be installed in accordance with IRC requirements behind exterior veneer and/or siding.

Flashing. Flashing shall be provided as follows to minimize water entry into wall and roof assemblies and to

direct water to exterior surfaces or exterior water-resistive barriers for drainage. Flashing details shall be

provided in the construction documents and shall be in accordance with the fenestration manufacturer’s

instructions, the flashing manufacturer’s instructions, or as detailed by a registered design professional.

Flashing shall be installed at the following locations, as applicable:

(1) around exterior fenestrations, skylights, and doors

(2) at roof valleys

(3) at building-to-deck, -balcony, -porch, and -stair intersections

(4) at roof-to-wall intersections, at roof-to-chimney intersections, at wall-to-chimney intersections, and at

parapets

(5) at ends of and under masonry, wood, or metal copings and sills

(6) above projecting wood trim

(7) at built-in roof gutters

(8) drip edge shall be installed at eave and rake edges

(9) window and door head and jamb flashing is either self-adhered flashing complying with AAMA 711-13

or liquid applied flashing complying with AAMA 714-15 and installed in accordance with flashing

fenestration or manufacturer’s installation instructions

(10) pan flashing is installed at sills of all exterior windows and doors

(11) seamless, preformed kickout flashing, or prefabricated metal with soldered seams is provided at

all roof-to-wall intersections. The type and thickness of the material used for roof flashing including but

not limited kickout and step flashing is commensurate with the anticipated service life of the roofing

material

(12) through-wall flashing is installed at transitions between wall cladding materials, or wall

construction types.

Tile backing materials. Tile backing materials installed under tiled surfaces in wet areas shall be in accordance

with ASTM C1178, C1278, C1288, or C1325. Tile shall not be installed over paper-faced drywall in wet areas.

Ice and water shield barrier. In areas where there has been a history of ice forming along the eaves causing a

backup of water, an ice barrier shall be installed in accordance with the IRC or IBC at roof eaves of pitched

roofs and shall extend a minimum of 24 inches (610 mm) inside the exterior wall line of the building.

Architectural features. Horizontal ledgers shall be sloped away to provide gravity drainage as appropriate for

the application.

Visible mold. Building materials with visible mold shall not be installed or shall be cleaned or encapsulated

prior to concealment and closing.

Visible Suspect Fungal Growth. Building materials with visible suspect fungal growth shall not be installed,

or shall be addressed in accordance with industry recognized guidelines such as ANSI/IICRC S520 Mold

Remediation or EPA 402-K-01-001 Table 2: Mold Remediation Guidelines, prior to concealment and closing.


Porous and semi-porous building materials should be stored in such a manner as to prevent excessive moisture

content prior to installation or use. Relative humidity within the structure shall be controlled during construction

so as to prevent the potential for microbial growth.

XX.602.1.10 Exterior doors. At least one entry at an exterior door assembly, inclusive of side lights (if any),

are covered by one of the following methods to protect the building from the effects of precipitation and solar

radiation. Either a storm door or a projection factor of 0.375 minimum is provided. Eastern- and western-facing

entries in Climate Zones 1, 2, and 3, as determined in accordance with Figure 6(1) or Appendix C, have either a

storm door or a projection factor of 1.0 minimum, unless protected from direct solar radiation by other means

(e.g., screen wall, vegetation).

(a) installing a porch roof or awning

(b) extending the roof overhang

(c) recessing the exterior door

(d) Installing a storm door

XX.602.1.12 Roof overhangs. Roof overhangs, in accordance with Table 11.602.1.12, are provided over a

minimum of 90 percent of exterior walls to protect the building envelope.

Roof Water Discharge. Gutters shall discharge 5’ from building, onto paved surfaces, or into areas designed to

infiltrate drainage into the ground or to water vegetation.

ENERGY EFFICIENCY

XX.701.0 Mandatory requirements. The building shall comply with Section 13.701 AND 13.702.0

(Performance Path), Section 13.703.0 (Prescriptive Path), or Section 13.704.0 (HERS Index Target Path).

Sampling is not allowed in air leakage and duct leakage testing for this alternative compliance path. The Energy

Star Program referenced in this Chapter is to version 3.0.

XX.701.1 Adopting entity review. A review by the Adopting Entity or approved third party shall be conducted

to verify design and compliance with these energy requirements.

XX.701.2 HVAC system sizing. Lot-specific space heating and cooling system is sized according to heating

and cooling loads calculated using ACCA Manual J, or equivalent. Equipment is selected using ACCA Manual

S and Manual D; or equivalent.

XX.701.3 Duct testing (Mandatory).

Ducts shall be pressure tested to determine air leakage by one of the following methods:

1. Rough-in test: Total leakage shall be measured with a pressure differential of 0.1 inch w.g. (25 Pa) across

the system, including the manufacturer’s air handler enclosure if installed at the time of the test. Registers

shall be taped or otherwise sealed during the test.

2. Postconstruction test: Total leakage shall be measured with a pressure differential of 0.1 inch w.g. (25 Pa)

across the entire system, including the manufacturer's air handler enclosure. Registers shall be taped or

otherwise sealed during the test.

Exceptions:

1. A duct air-leakage test shall not be required where the ducts and air handlers are located entirely within the

building thermal envelope.

2. A duct air-leakage test shall not be required for ducts serving heat or energy recovery ventilators that are not

integrated with ducts serving heating or cooling systems.


A written report of the results of the test shall be signed by the party conducting the test and provided to the

code official. Sampling shall not be permitted for this practice.

XX.701.4 Radiant and hydronic space heating. Where installed as a primary heat source in the building,

radiant or hydronic space heating system is designed, installed, and documented, using industry-approved

guidelines and standards (e.g., ACCA Manual J, AHRI I=B=R, ACCA 5 QI-2010, or an accredited design

professional’s and manufacturer’s recommendations).

XX.701.5 Building Thermal Envelope Air Sealing. The building thermal envelope is durably sealed to limit

infiltration. The sealing methods between dissimilar materials allow for differential expansion and contraction.

The following are caulked, gasketed, weather-stripped or otherwise sealed with an air barrier material, suitable

film, or solid material:

(a) All joints, seams and penetrations.

(b) Site-built windows, doors, and skylights.

(c) Openings between window and door assemblies and their respective jambs and framing.

(d) Utility penetrations.

(e) Dropped ceilings or chases adjacent to the thermal envelope.

(f) Knee walls.

(g) Walls and ceilings separating a garage from conditioned spaces.

(h) Behind tubs and showers on exterior walls.

(i) Common walls between dwelling units.

(j) Attic access openings.

(k) Rim joist junction.

(l) Other sources of infiltration.

XX.701.6 Air sealing and insulation. Grade II and Grade III insulation shall not be permitted. Building

envelope air tightness and insulation installation shall be verified to be in accordance with Section A and B.

A. Testing. Building envelope tightness shall be tested and verified as having an air leakage rate not

exceeding five air changes per hour in Climate Zone 1 or 2 and three air changes per hour in Climate

Zones 3 through 8. Sampling shall not be permitted for this practice. Testing shall be conducted in

accordance with ASTM E-779 or ASTM 1827 or RESNET/ICC 380 using a blower door at a test

pressure of 1.04 psf (50 Pa). Testing shall be conducted after rough-in and after installation of

penetrations of the building envelope, including penetrations for utilities, plumbing, electrical,

ventilation, and combustion appliances. Testing shall be conducted under the following conditions:

a) Exterior windows and doors, fireplace and stove doors are closed, but not sealed;

b) Dampers are closed, but not sealed, including exhaust, intake, make-up air, backdraft and flue

dampers;

c) Interior doors are open;

d) Exterior openings for continuous ventilation systems and heat recovery ventilators are closed and

sealed;

e) Heating, cooling, and ventilation systems are turned off;

f) HVAC duct terminations are not sealed; and

g) Supply and return registers are not sealed.

B. Visual inspection. The air barrier and insulation items listed in Table 13.701.4.3.2(2) shall be field

verified by visual inspection.


Table 701.4.3.2(2) Air Barrier and Insulation Installation

COMPONENT AIR BARRIER CRITERIA INSULATION INSTALLATION CRITERIA

General requirements

A continuous air barrier shall be installed in the

building envelope.

The exterior thermal envelope contains a continuous

air barrier.

Breaks or joints in the air barrier shall be sealed.

Air-permeable insulation shall not be used as a

sealing material.

Ceiling/attic

The air barrier in any dropped ceiling/soffit shall be

aligned with the insulation and any gaps in the air

barrier shall be sealed.

Access openings. drop down stairs or knee wall

doors to unconditioned attic spaces shall be sealed.

The insulation in any dropped ceiling/soffit shall be

aligned with the air barrier.

Walls

The junction of the foundation and sill plate shall be

sealed.

The junction of the top plate and the top of exterior

walls shall be sealed.

Knee walls shall be sealed.

Cavities within comers and headers of frame walls

shall be insulated by completely filling the cavity

with a material having a thermal resistance of R-3

per inch minimum.

Exterior thermal envelope insulation for framed

walls shall be installed in substantial contact and

continuous alignment with the air barrier.

Windows, skylights and doors The space between window/doorjambs and framing,

and skylights and framing shall be sealed.

Rim joists Rim joists shall include the air barrier. Rim joists shall be insulated.

Floors (including above garage

and cantilevered floors)

The air barrier shall be installed at any exposed

edge of insulation.

Floor framing cavity insulation shall be installed to

maintain permanent contact with the underside of

subfloor decking, or floor framing cavity insulation

shall be permitted to be in contact with the top side

of sheathing, or continuous insulation installed on

the underside of floor framing and extends from the

bottom to the top of all perimeter floor framing

members.

Crawl space walls

Exposed earth in unvented crawl spaces shall be

covered with a Class I vapor retarder with

overlapping joints taped.

Where provided instead of floor insulation,

insulation shall be permanently attached to the

crawlspace walls.

Shafts, penetrations

Duct shafts, utility penetrations, and flue shafts

opening to exterior or unconditioned space shall be

sealed.

Narrow cavities

Batts in narrow cavities shall be cut to fit, or narrow

cavities shall be filled by insulation that on

installation readily conforms to the available cavity

space.

Garage separation Air sealing shall be provided between the garage

and conditioned spaces.

Recessed lighting Recessed light fixtures installed in the building

thermal envelope shall be sealed to the drywall.

Recessed light fixtures installed in the building

thermal envelope shall be air tight and IC rated.

Plumbing and wiring

Batt insulation shall be cut neatly to fit around

wiring and plumbing in exterior walls, or insulation

that on installation readily conforms to available

space shall extend behind piping and wiring.

Shower/tub on exterior wall

The air barrier installed at exterior walls adjacent to

showers and tubs shall separate them from the

showers and tubs.

Exterior walls adjacent to showers and tubs shall be

insulated.

Electrical/phone box on exterior

walls

The air barrier shall be installed behind electrical or

communication boxes or air-sealed boxes shall be

installed.

HVAC register boots HVAC register boots that penetrate building thermal

envelope shall be sealed to the subfloor or drywall.

Concealed sprinklers

When required to be sealed, concealed fire sprinklers

shall only be sealed in a manner that is recommended

by the manufacturer. Caulking or other adhesive

sealants shall not be used to fill voids between fire

sprinkler cover plates and walls or ceilings.

a. In addition, inspection of log walls shall be in accordance with the provisions of ICC-400.


XX.701.7 High-efficacy lighting. A minimum of 90 percent of the total hard-wired lighting fixtures or the

bulbs in those fixtures qualify as high efficacy or equivalent.

XX.701.8 Appliances. If installed, refrigerator, dishwasher, and/or washing machine shall be ENERGYSTAR

or equivalent.

XX.701.9 Clothes washers. Clothes washers rated with an IWF (integrated water factor), MEF (modified

energy factor), or IMEF (integrated modified energy factor), shall be rated as follows:

1. Residential Clothes Washers, Front-loading, > 2.5 cu-ft

maximum IWF 3.2, minimum IMEF 2.76

2. Residential Clothes Washers, T op-loading, > 2.5 cu-ft

maximum 4.3 IWF, minimum IMEF 2.06

3. Residential Clothes Washers (≤ 2.5 cu-ft)

maximum 4.2 IWF, minimum IMEF 2.07

XX.702.0 Energy performance pathway.

XX.702.1 IECC analysis. Energy efficiency features are implemented to achieve energy cost or source energy

performance that exceeds the IECC by 7.5 percent. A documented analysis using software in accordance with

IECC, Section R405, is required.

XX.702.2 Energy performance analysis. Energy savings levels above the ICC IECC are determined through

an analysis that includes improvements in building envelope, air infiltration, heating system efficiencies,

cooling system efficiencies, duct sealing, water heating system efficiencies, lighting, and appliances.

XX.703.0 Energy prescriptive pathway

XX.703.1 UA Compliance. The building thermal envelope complies with Section 13.703.1.1 or 13.703.1.2.

Exception: 13.703.1 is not required for Tropical Climate Zone

XX.703.1.1 Maximum UA. The total building UA is less than or equal to the total maximum UA as computed

by IECC Section R402.1.5. The total UA proposed and baseline calculations are documented. REScheck is

deemed to provide UA calculation documentation.

XX.703.1.2 R-values and fenestration requirements. The building thermal envelope is in accordance with the

insulation and fenestration requirements of IECC Table R402.1.1. The SHGC is in accordance with the IECC

requirements.

TABLE 402.1.2

INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTa

CLIMATE ZONE

FENESTRATION U-FACTORb

SKYLIGHTb U-FACTOR

GLAZED FENESTRATION

SHGC b, e

CEILING R-VALUE

WOOD FRAME WALL R-VALUE

MASS WALL

R-VALUEi

FLOOR R-VALUE

BASEMENTc WALL

U-FACTOR

SLABd R-VALUE & DEPTH

CRAWL SPACEc WALL R-VALUE

1 NR 0.75 0.25 30 13 3/4 13 0 0 0

2 0.40 0.65 0.25 38 13 4/6 13 0 0 0

3 0.32 0.55 0.25 38 20 or 13+5h 8/13 19 5/13f 0 5/13

4 except Marine

0.32 0.55 0.40 49 20 or 13+5h 8/13 19 10/13 10, 2 ft 10/13

5 and Marine 4

0.30 0.55 NR 49 20 or 13+5h 13/17 30g 15/19 10, 2 ft 15/19

6 0.30 0.55 NR 49 20+5h or 13+10h 15/20 30g 15/19 10, 4 ft 15/19

7 and 8 3.30 0.55 NR 49 20+5h or 13+10h 19/21 38g 15/19 10, 4 ft 15/19


NR = Not Required. For SI: 1 foot = 304.8 mm.

a. R-values are minimums. U-factors and SHGC are maximums. Where insulation is installed in a cavity that is less than the label or design thickness of the insulation, the installed R-value of the insulation shall be not less than the R-value specified in the table.

b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration. Exception: In Climate Zones 1 through 3, skylights shall be permitted to be excluded from glazed fenestration SHGC requirements provided that the

SHGC for such skylights does not exceed 0.30.

c. “10/13” means R-10 continuous insulation on the interior or exterior of the home or R-13 cavity insulation on the interior of the basement wall. “15/19” means R-15 continuous insulation on the interior or exterior of the home or R-19 cavity insulation at the interior basement wall. Alternatively, compliance with “15/19” shall be R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the home.

d. R-5 insulation shall be provided under the full slab area of a heated slab in addition to the required slab edge insulation R-value for slabs, as indicated in the table. The slab edge insulation for heated slabs shall not be required to extend below the slab.

e. There are not SHGC requirements in the Marine Zone.

f. Basement wall insulation is not required in warm-humid locations as defined by Figure R301.1 and Table R301.1.

g. Alternatively, insulation sufficient to fill the framing cavity and providing not less than an R-value of R-19.

h. The first value is cavity insulation, the second value is continuous insulation. Therefore, as an example, “13+5” means R-13 cavity insulation plus R-5 continuous insulation.

i. Mass walls shall be in accordance with Section R402.2.5. The second R-value applies where more than half of the insulation is on the interior of the mass wall.

R402.1.4 U-factor alternative.

An assembly with a U-factor equal to or less than that specified in Table R402.1.4 shall be an alternative to the

R-value in Table R402.1.2. TABLE R402.1.4

EQUIVALENT U-FACTORSa

CLIMATE ZONE FENESTRATION U-FACTOR

SKYLIGHT U-FACTOR

CEILING U-FACTOR

FRAME WALL U-FACTOR

MASS WALL

U-FACTORb

FLOOR U-FACTOR

BASEMENT WALL

U-FACTOR

CRAWL SPACE WALL

U-FACTOR

1 0.50 0.75 0.035 0.084 0.197 0.064 0.360 0.477

2 0.40 0.65 0.030 0.084 0.165 0.064 0.360 0.477

3 0.32 0.55 0.030 0.060 0.098 0.047 0.091c 0.136

4 except Marine 0.32 0.55 0.026 0.060 0.098 0.047 0.059 0.065

5 and Marine 4 0.30 0.55 0.026 0.060 0.082 0.033 0.050 0.055

6 0.30 0.55 0.026 0.045 0.060 0.033 0.050 0.055

7 and 8 0.30 0.55 0.026 0.045 0.057 0.028 0.050 0.055

a. Nonfenestration U-factors shall be obtained from measurement, calculation or an approved source.

b. Mass walls shall be in accordance with Section R402.2.5. Where more than half the insulation is on the interior, the mass wall U-factors shall not exceed 0.17 in Climate Zone 1, 0.14 in Climate Zone 2, 0.12 in Climate Zone 3, 0.087 in Climate Zone 4 except Marine, 0.065 in Climate Zone 5 and Marine 4, and 0.57 in Climate Zones 6 through 8.


XX.703.2 Space Heating and Cooling and Water Heating System Efficiencies. The Space Heating and

Cooling and Water Heating systems are in accordance with Table 13.703.2.

Table 13.703.2 Climate

Zone

Space Cooling

System

Space Heating System - select 1 option from

below

Water Heating System - select 1 option

from below

AC

Gas

Furnace

Gas

Boiler ASHP

GSHP or

WSHP

Gas Tank

WH

Gas

Tankless

WH

Elec Tank WH

<55 gal

Min. Req.

Min.

Req.

Min.

Req. Min. Req. Min. Req.

Min.

Req. Min. Req. Min. Req.

1 15 SEER** NA 85% NA Any

<= 55 gal

0.67 >

55 gal

0.77 >.90 >.95

2 15 SEER** NA 85% NA Any same >.90 >.95

3 15 SEER** 92% 85%

≥ 8.5

HSPF* Any same >.90 >.95

4 15 SEER** 92% 85%

≥ 8.5


5 14 SEER 95% 85%

≥ 8.5


6 14 SEER 95% 85%

≥ 8.5


7 14 SEER 95% 85%

≥ 8.5


8 14 SEER 95% 85%

≥ 8.5


* ≥ 8.2 HSPF for single package

**zones 1-4 ≥12.5 EER for split; ≥12 EER for single package

XX.703.3 Duct leakage.

The total leakage of the ducts, where measured in accordance with Section R403.3.3, shall be as follows:

1. Rough-in test: The total leakage shall be less than or equal to 4 cubic feet per minute (113.3 L/min) per 100

square feet (9.29 m2) of conditioned floor area where the air handler is installed at the time of the test. Where

the air handler is not installed at the time of the test, the total leakage shall be less than or equal to 3 cubic

feet per minute (85 L/min) per 100 square feet (9.29 m2) of conditioned floor area.

2. Postconstruction test: Total leakage shall be less than or equal to 4 cubic feet per minute (113.3 L/min) per

100 square feet (9.29 m2) of conditioned floor area.

XX.703.4 High-efficacy lighting. A minimum of 95 percent of the total hard-wired lighting fixtures or the

bulbs in those fixtures qualify as high efficacy or equivalent.

XX.705.0 HERS Index target pathway

XX.705.1 HERS index target compliance. Energy efficiency features are implemented to achieve a HERS

Index performance that is 8 points less than the EPA HERS Index Target Procedure for Energy Star Qualified

Homes version 3.0 as computed based on Steps “1a” through “1d” of the EPA HERS Index Target Procedure.


WATER EFFICIENCY

XX.803 Lavatory faucets. Water-efficient lavatory faucets in bathrooms shall have a maximum flow rate of

1.5 gpm (5.68 L/m), tested at 60 psi (414 kPa) in accordance with ASME A112.18.1.

XX.805 Water closets shall have an effective flush volume of 1.28 gallons or less and shall meet a minimum

MaP threshold of 350 and/or shall be WaterSense.

Irrigation systems. Where an irrigation system is installed, one of the following is met:

(1) Drip irrigation is installed for all landscape beds and/or subsurface drip irrigation is installed for all

turf grass areas.

(2) Irrigation zones are organized by plant water needs.

(3) The irrigation system(s) is controlled by a climate-based controller, soil moisture controller or no

irrigation is installed.

Alternative Compliance Path: Water Rating Index (WRI) needs to achieve set level 75.

INDOOR ENVIRONMENTAL QUALITY

XX.901.1.4 Gas-fired fireplaces and direct heating equipment is listed and is installed in accordance with the

NFPA 54, ICC IFGC, or the applicable local gas appliance installation code. Gas-fired fireplaces within

dwelling units and direct heating equipment are vented to the outdoors.

XX.901.2.1 Solid fuel-burning fireplaces, inserts, stoves and heaters are code compliant and are in accordance

with one or more of the following requirements:

(1) Site-built masonry wood-burning fireplaces use outside combustion air and include a means of sealing

the flue and the combustion air outlets to minimize interior air (heat) loss when not in operation.

(2) Factory-built, wood-burning fireplaces are in accordance with the certification requirements of UL 127

and are EPA certified or Phase 2 Qualified.

(3) Wood stove and fireplace inserts, as defined in UL 1482 Section 3.8, are in accordance with the

certification requirements of UL 1482 and are in accordance with the emission requirements of the EPA

Certification and the State of Washington WAC 173-433-100(3).

(4) Pellet (biomass) stoves and furnaces are in accordance with ASTM E1509 or are EPA certified.

(5) Masonry heaters are in accordance with the definitions in ASTM E1602 and ICC IBC Section 2112.1.

(6) Fireplaces, woodstoves, pellet stoves, or masonry heaters are not installed.

XX.902 Garages. Garages shall be in accordance with “a” or “b”:

a. Attached garage

(1) Doors installed in the common wall between the attached garage and conditioned space

are tightly sealed and gasketed and;

(2) A continuous air barrier is provided separating the garage space from the conditioned

living spaces.

b. A carport is installed, the garage is detached from the building, or no garage is installed.

XX.903 Carpets. Wall-to-wall carpeting shall not be installed adjacent to

(a) water closets and bathing fixtures, and

(b) exterior doors.

Carbon monoxide (CO) alarms. A carbon monoxide (CO) alarm shall be provided in accordance with IRC

Section R315 in any dwelling unit with a combustion fueled appliance or an attached garage with an opening that

communicates with the dwelling unit.

Paint VOC content shall be in accordance with Table 13.901.9.2.


Interior Architectural Coatings. A minimum of 85 percent of the interior architectural coatings are in

accordance with one or more of the following:

(1) Zero VOC as determined by EPA method 24 (VOC content is below the detection limit for the

method)

(2) Green Seal GS-11

(3) CARB Suggested Control Measure for Architectural Coatings (see Table 901.9.1)

Spot ventilation shall be in accordance with the following:

(1) Bathrooms are vented to the outdoors. The minimum tested ventilation rate is 50 cfm (23.6 L/s) for

intermittent operation or 20 cfm (9.4 L/s) for continuous operation in bathrooms. Exhaust fans are

ENERGY STAR, or equivalent, fans.

(2) Kitchen exhaust units and/or range hoods are ducted to the outdoors and have a minimum ventilation

rate of 100 cfm (47.2 L/s) for intermittent operation or 25 cfm (11.8 L/s) for continuous operation.

(3) Bathroom and kitchen exhaust ventilation rates are tested to meet minimum ventilation rates or ducts are

installed to meet the prescriptive requirements in IRC Table M1504.2

Whole Dwelling Ventilation. One of the following whole dwelling ventilation systems shall be implemented

and shall be in accordance with the specifications of Appendix B. An explanation of the operation and

importance of the ventilation system shall be included in the homeowner’s manual practice.

(1) exhaust air ventilation system equipped with outdoor air ducts and intake(s) for ventilation air

(2) exhaust air ventilation system equipped with outdoor air ducts and intake(s) for ventilation air and with

automatic ventilation controls to limit ventilation air during periods of extreme temperature, extreme

humidity and/or during times of peak utility loads.

(3) Supply air ventilation system

(4) supply air ventilation system equipped with automatic ventilation controls to limit ventilation air during

periods of extreme temperature, extreme humidity and/or during times of peak utility loads

(5) balanced air ventilation system with exhaust and supply fan(s) with supply intakes located in accordance

with the manufacturer’s guidelines so as to not introduce polluted air back into the building

(6) heat-recovery ventilator

(7) balanced air ventilation system with exhaust and supply fan(s) with automatic ventilation controls to

limit ventilation air during periods of extreme temperature, extreme humidity and/or during times of

peak utility loads, and with intakes located in accordance with the manufacturer's guidelines so as to not

introduce polluted air back in to the building

(8) energy-recovery ventilator

Radon control. Radon control measures are installed in accordance with 802.3 for Zone 1 as defined in Figure

9(1).

(a) a passive radon system is installed, or

(b) an active radon system is installed

Kitchen exhaust. If a kitchen exhaust unit(s) that equals or exceeds 400 cfm (189 L/s) is installed, make-up air

shall be provided

MERV filters. Minimum 8 MERV filters shall be installed on central forced air systems and are accessible.

Six months of filters shall be provided to occupant.


HVAC system protection. One of the following HVAC system protection measures shall be performed.

a) HVAC supply registers (boots), return grilles, and rough-ins are covered during construction

activities to prevent dust and other pollutants from entering the system.

b) Prior to owner occupancy, HVAC supply registers (boots), return grilles, and duct terminations

are inspected and vacuumed. In addition, the coils are inspected and cleaned and the filter is

replaced if necessary.

HOMEOWNER OPERATION AND MAINTAINANCE

Homeowner’s manual. A homeowner’s manual shall be provided. The homeowner’s manual shall include all

items below:

(1) A National Green Building Standard certificate with a web link and completion document.

(2) List of green building features (can include the National Green Building Standard checklist).

(3) Product manufacturer’s manuals or product data sheet for installed major equipment, fixtures, and

appliances. If product data sheet is in the building owners’ manual, manufacturer’s manual may be

attached to the appliance in lieu of inclusion in the building owners’ manual.

(4) Maintenance checklist.

(5) Information on the importance and operation of the home's fresh air ventilation system.

(6) Provide information on regionally-appropriate vegetation from the local authority with jurisdiction

(7) A narrative detailing the importance of maintenance and operation of the green building features

from the National Green Building Standard checklist in retaining the attributes of a green-built

home.

(8) Where stormwater management measures are installed on the lot, information on the location,

purpose, and upkeep of these measures.

Training of initial homeowners. Initial homeowners shall be familiarized with the role of occupants in

achieving green goals. Training is provided to the responsible party(ies) regarding equipment operation and

maintenance, control systems, and occupant role. These include:

(1) HVAC filters.

(2) Water heater settings.

(3) Whole-house ventilation systems.


P044 – Commercial Spaces New Construction 101.1 Intent. This chapter shall provide green requirements for the non-residential portion(s) of a mixed-use building. 101.2 Scope. The provisions of this Chapter shall apply to the design, construction, addition, and alteration of non-residential portion(s)

of a mixed-use building. 102.1 Compliance. The non-residential portion(s) of a mixed-use building shall comply with all of the provisions of this chapter as

applicable. The provisions of this Chapter are mandatory to demonstrate compliance with this Chapter. 102.1.1 Core and Shell compliance. The exterior air barrier, insulation, air sealing, and fenestration, are verified to the requirements

of this chapter at the time of certification. 102.1.2 Full mixed-use building compliance. Residential and non-residential spaces are verified to the requirements of this standard

at the time of certification. The residential portions of the building are verified to the requirements of Chapters 5 through 10 of this standard. The non-residential portion(s) of the building must comply with the requirements of this chapter. 102.1.3 Additions and alterations. The provisions of this Chapter shall only apply to areas of the building that are exposed or created

during the remodel of mixed-use building(s) complying with Section 305, Green Remodeling. 102.1.4 Alternate compliance. Non-residential portions of a building shall comply with Chapters 6 through 10 of the International

Green Construction Code. Exception: Section 6.3.1 of the International Green Construction Code. 103.1 Bicycle Parking. Bicycle parking shall comply with section 103.1.1 through 103.1.2 103.1.1 Minimum number of spaces. The minimum number of required bicycle parking spaces shall be 4 parking spaces.

Exceptions:

1) The number of bicycle parking spaces shall be allowed to be reduced subject to Adopting Entity approval, 2) Bicycle parking shall not be required where the total non-residential conditioned space in the building is less than

1,000 square feet. 3) The minimum number of spaces shall be permitted to be reduced by the authority having jurisdiction based on the

occupants expected use of public transit or walking to the building. 103.1.2 Location. The bicycle parking must be located on the same building site or within the building. It must be located within 100 ft.

of, and visible from the main entrance. 104 Resource efficiency 104.1 Enhanced Durability 104.1.1 Capillary Break. A capillary break and vapor retarder shall be installed under the concrete slabs in accordance with ICC IBC

Sections 1907, excluding exception #3 and 1805.2.1. 104.1.2 Foundation drainage. Where required by the ICC IBC for habitable and usable spaces below grade, exterior drain tile is

installed. 104.1.3 Dampproof walls. Walls that retain earth, and encloses interior space are required to be dampproof per ICC IBC Section 1805. 104.1.4 Water-resistive barrier. Where required by the ICC IBC, a water-resistive barrier and/or drainage plane system is installed

behind exterior cladding. 104.1.5 Flashing. Flashing is provided as follows to minimize water entry into wall and roof assemblies and to direct water to exterior

surfaces or exterior water-resistive barriers for drainage. Flashing details are provided in the construction documents and are in accordance with the fenestration manufacturer’s instructions, the flashing manufacturer’s instructions, or as detailed by a registered design professional. Flashing is installed at the following locations, as applicable unless in conflict with manufacturer’s installation instructions:

(13) around exterior fenestrations, skylights, and doors

(14) at roof valleys

(15) at all building-to-deck, -balcony, -porch, and -stair intersections

(16) at roof-to-wall intersections, at roof-to-chimney intersections, at wall-to-chimney intersections, and at parapets

(17) at ends of and under masonry, wood, or metal copings and sills

(18) above projecting wood trim

(19) at built-in roof gutters, and

(20) drip edge is installed at eave and rake edges.

(21) Window and door head and jamb flashing is either self-adhered or liquid applied.

(22) Flashing is installed at exterior windows and doors

(23) Through-wall flashing is installed at transitions between wall cladding materials or wall construction types.

(24) Flashing is installed at the expansion joint in stucco walls.

104.1.6 Tile backing materials. Tile backing materials installed under tiled surfaces in wet areas are in accordance with ASTM C1178,

C1278, C1288, or C1325. Tile shall not be installed over paper-faced gypsum board in wet areas.


104.1.7 Ice barrier. In areas where there has been a history of ice forming along the eaves causing a backup of water, an ice barrier is

installed in accordance with the ICC IBC at roof eaves of pitched roofs and extends a minimum of 24 inches (610 mm) inside the exterior wall line of the building. 104.1.8 Architectural features. Architectural features that increase the potential for water intrusion are avoided, and must comply with

the following: 1) Horizontal ledgers are sloped away to provide gravity drainage as appropriate for the application.

2) No roof configurations that create horizontal valleys in roof design

3) No recessed windows and architectural features that trap water on horizontal surfaces.

104.1.10 Moisture control measures. Moisture control measures for newly installed materials are in accordance with the

following: (1) Building materials with visible mold are not installed or are cleaned or encapsulated prior to concealment and closing.

2) Insulation in cavities is dry in accordance with manufacturer’s installation instructions when enclosed (e.g., with drywall)

104.2 Construction material and waste management plan. A written construction waste management plan is posted at the jobsite,

and implemented. 104.3 Core and shell material selection. The core and shell of the non-residential portion of the building must contain similar green

material selections of the residential portion of the building, and must comply with the additional provisions of this section. 104.3.1 Material selection. At least two types of the materials must be used from the following, and must comply with at least one of

Sections of this standard that are listed below: 1. Biobased products Section 606.1

2. Wood-based products Section 606.2

3. Manufacturing energy Section 606.3

4. Resource-efficient materials Section 608.1

5. Regional materials Section 609.1

6. Product LCA Section 610.1.2.1

7. Building assemble LCA Section 610.1.2.2

8. Manufacturer’s environmental management system concepts Section 611.1

9. Sustainable products Section 611.2

10. Salvaged materials Section 603.2

11. Product declarations Section 611.4 and 611.4.2

12. Recycled content Section 604.1

105 Energy Efficiency 105.1 Building thermal envelope insulation. The non-residential portion of the building must comply with the insulation requirements

of Sections C402.1 through C402.3 of the ICC IECC as applicable, and Section 105.1.1. A UA tradeoff that includes both the opaque envelop and fenestration shall be allowed for sections 105.1 and 105.2 is equal to or less than the IECC UA. Maximum UA. For IECC residential, the total building UA is less than or equal to the total maximum UA as computed by 2015 IECC

Section R02.1.5. For IECC commercial, the total UA is less than or equal to the sum of the UA for 2015 IECC Tables C402.1.4 and C402.4, including the U-factor times the area and C-factor or F-factor times the perimeter. The total UA proposed and baseline calculations are documented. REScheck or COMcheck is deemed to provide UA calculation documentation. 105.1.1 Insulation installation. Insulation installed in the thermal envelope shall be visually inspected. Grade II and III insulation

installation is not permitted. 105.2 Building thermal envelope fenestration. The non-residential portion of the building must contain the equivalent fenestration

values utilized in the residential portion shall be in accordance with the requirements of Section C402.4 of the International Energy Conservation Code as applicable. 105.3 Building thermal envelope air sealing. The building thermal envelope is durably sealed to limit infiltration. The sealing methods

between dissimilar materials allow for differential expansion and contraction. The following are caulked, gasketed, weather-stripped or otherwise sealed with an air barrier material, suitable film, or solid material:

1. All joints, seams and penetrations.

2. Site-built windows, doors and skylights.

3. Openings between window and door assemblies and their respective jambs and framing.

4. Utility penetrations.


5. Dropped ceilings or chases adjacent to the thermal envelope.

6. Knee walls.

7. Walls and ceilings separating the garage from conditioned spaces.

8. Behind tubs and showers on exterior walls.

9. Cantilevers.

10. Attic access openings.

11. Rim joists junction.

12. Other sources of infiltration.

105.3.1 Air barrier verification. The air barrier shall be visually inspected to demonstrate compliance with Table 701.4.3.2(2) of this standard or the building thermal envelope shall be tested in accordance with ASTM E 779 at a pressure differential of 0.3 inch water gauge (75 Pa) or an equivalent method approved by the code official and deemed to comply with the provisions of this section when the tested air leakage rate of the building thermal envelope is not greater than 0.40 cfm/ft2 (2.0 L/s • m2).

105.4 Energy metering. Energy metering shall be provided for each tenant individually for the non-residential portions of the building. Exception: non-residential spaces under 10,000 square feet.

105.5 Efficiency of HVAC equipment. HVAC equipment shall meet the minimum efficiency requirements listed in Tables C403.3.2(1)

through C403.3.2(7) of the International Energy Conservation Code.

105.6 Efficiency of Service Water Heating equipment. Service Water Heating equipment shall meet the minimum efficiency

requirements listed in ICC IECC Table C404.2

105.7 Lighting. The total interior lighting power allowance shall be less than the total lighting power allowance in accordance with

Section C405.3.2 of the International Energy Conservation Code.

105.8 Commissioning.

105.8.1 Mechanical and service water heating systems. Mechanical and service water heating systems shall comply with ICC IECC

Section C408.2.

105.9 Calculation of heating and cooling loads. Design loads associated with heating, ventilating and air conditioning of the building

shall be determined in accordance with ANSI/ASHRAE/ACCA Standard 183 or by an approved equivalent computational procedure and using the design parameters specified in Chapter 3 of the ICC IECC. Heating and cooling loads shall be adjusted to account for load reductions that are achieved where energy recovery systems are utilized in the HVAC system in accordance with the ASHRAE HVAC Systems and Equipment Handbook or an approved equivalent computational procedure.

105.10 Duct air sealing. Ductwork shall be constructed in accordance with the ICC IMC.

105.11 Heated-water circulation and temperature maintenance. Where installed, heated- water circulation systems shall be in

accordance with Section 105.11.1. Heat trace temperature maintenance systems shall be in accordance with Section 105.11.2. Controls for hot water storage shall be in accordance with Section 105.11.3. Automatic controls, temperature sensors, and pumps shall be in a location that is accessible. Manual controls shall be in a location with ready access.

105.11.1 Circulation systems. Heated-water circulation systems shall be provided with a circulation pump. The system return pipe

shall be a dedicated return pipe, or a cold water supply pipe. Gravity and thermos-syphon circulation systems shall be prohibited. Controls for circulation hot water system pumps shall start the pump based on the identification of a demand for hot water. The controls shall automatically turn off the pump when the water in the circulation loop is at the desired temperature and when there is not a demand for hot water.

105.11.2 Heat trace systems. Electric heat trace systems shall comply with IECC 505.1. Controls for such systems shall be able to

automatically adjust the energy input to the heat tracing to maintain the desired water temperature in the piping in accordance with the times when heated water is used in the occupancy. Heat trace shall be arranged to be turned off automatically when there is not a demand for hot water.

105.11.3 Controls for hot water storage. The controls on pumps that circulate water between a water heater and a heated water

storage tank shall limit the operation of the pump from the heating cycle startup to not greater than 5 minutes are the end of the cycle.

105.12 Energy options. Non-residential portions of the building shall comply with one of the three options below:

105.12.1 Energy requirements shall be met if modeling in accordance with C407 shows a 10% reduction in energy from the IECC.

105.12.2 Energy requirements shall be met if modeling in accordance with ASHRAE 90.1 Appendix G shows a 10% reduction in energy

cost from the prescribed levels.

105.12.3 Energy requirements shall be met if at least two options in IECC Section C406 are met.


106 Water efficiency and conservation.

106.1 Fitting and fixture consumption. Plumbing fixtures and fixture fittings shall comply with the maximum flow rates specified in

Table 106.1. Plumbing fixtures and fixture fittings in Table 106.1 shall have a manufacturer’s designation for flow rate. Exceptions: The following fixtures and devices shall not be required to comply with the reduced flow rates in Table 106.1.

1. Clinical sinks having a maximum water consumption of 4.5 gallons (17 L) per flush.

2. Service sinks, bath valves, pot fillers, laboratory faucets, utility faucets, and other fittings designed primarily for filling operations.

3. Fixtures, fittings, and devices whose primary purpose is safety.

TABLE 106.1 MAXIMUM FLOW RATES AND FLUSH VOLUMES FIXTURE OR FIXTURE FITTING TYPE MAXIMUM FLOW RATE OR FLUSH VOLUME

a. Includes hand showers, body sprays, rainfall panels and jets. b. Gallons per cycle. c. Dual flush water closets in public bathrooms shall have a

maximum full flush of 1.28. d. The flush volume for water closets that are located at least 30 feet upstream of other drain line connections or fixtures and

having less than 1.5 fixture units upstream of the water closet’s connection to the drain line shall be not more than 1.5 gpf.

e. Bottle filling stations associated with drinking fountains shall not have limitations for flow rate.

106.2 Once-through cooling for appliances and equipment. Once-through or single-pass cooling with potable or municipal

reclaimed water is prohibited.

106.3 Clothes washers. Clothes washers rated with an IWF (integrated water factor), MEF (modified energy factor), or IMEF

(integrated modified energy factor), shall be rated as follows: 4. Residential Clothes Washers, Front-loading, > 2.5 cu-ft

maximum IWF 3.2 minimum IMEF 2.76 5. Residential Clothes Washers, T op-loading, > 2.5 cu-ft

maximum 4.3 IWF, minimum IMEF 2.06 6. Residential Clothes Washers (≤ 2.5 cu-ft)

maximum 4.2 IWF, minimum IMEF 2.07 7. Commercial Clothes Washers

maximum 4.0 IWF, minimum MEF 2.20

106.4 Food Service. 106.4.1 Dipper wells. The water supply to a dipper well shall have a shutoff valve and flow control valve. The maximum flow shall not

exceed 1 gpm (3.78 lpm) at a supply pressure of 60 psi (413.7 kPa). The dipper well shall have a manufacturer’s designation of flow rate. 106.4.2 Food waste disposal. The disposal of food wastes that are collected as part of preparing ware for one or more of the following

shall accomplish washing: 1. A food strainer (scrapper) basket that is emptied into a trash can. 2. A garbage grinder where the water flow into the food waste disposer is controlled by a load sensing device such that the water flow

does not exceed 1 gpm under no-load operating conditions and 8 gpm under full-load operating conditions 3. A pulper or mechanical strainer that uses not more than 2 gpm of potable water.

106.4.3 Pre-rinse spray heads. Food service pre-rinse spray heads shall have a manufacturers

FIXTURE OR FIXTURE FITTING TYPE MAXIMUM FLOW RATE OR FLUSH

VOLUME Showerheada 2.0 gpm at 80 psi

Lavatory faucet and bar sink-private 1.5 gpm at 60 psi Lavatory faucet-public (metering) 0.25 gpcb at 60 psi Lavatory faucet-public (non-metering) 0.5 gpm at 60 psi

Kitchen faucet-private 1.8 gpm at 60 psi Kitchen and bar sink faucets in other than dwelling 2.2 gpm at 60 psi

units and guest rooms Urinal 0.5 gpf or nonwater urinal

Water closet 1.28 gpfc,d Prerinse Spray Valves 1.3 gpm

Drinking Fountains (manual) 0.7 gpme

Drinking Fountains (metered) 0.25 gpcb,e


designation of flow rate, shall comply with the maximum flow rate in Table 1305.1, and shall shut off automatically when released. 106.4.4 Hand washing faucets. Faucets for hand washing sinks in food service preparation and serving areas shall be of the self-

closing type. 106.5. Water softeners. Water softeners shall comply with Sections 106.5.1 through 106.5.3.

106.5.1 Demand initiated regeneration. Water softeners shall be equipped with demand- initiated regeneration control systems. Such

control systems shall automatically initiate the regeneration cycle after determining the depletion, or impending depletion of softening capacity. 106.5.2 Water consumption. Water softeners shall have a maximum water consumption during regeneration of 5 gal (18.9 L) per 1000

grains of hardness removed as measured in accordance with NSF 44. 106.5.3 Waste connections. Waste water from water softener regeneration shall not discharge to reclaimed, gray water or rainwater

water collection systems and shall discharge in accordance with the International Plumbing Code. 106.6 Heat exchangers. Once-through or single-pass cooling with potable or municipal reclaimed water is prohibited. Heat exchangers

shall be connected to a recirculating water system such as a chilled water loop, cooling tower loop, or similar recirculating system. 107 Indoor air quality

107.1 Carpets. Carpeting is not installed adjacent to water closets and bathing and or shower fixtures.

107.1.1 Entry. The primary entryway from the outdoors shall include one of the following:

1. Permanent walk-off mat that is at least 4 feet (1.2 meters) long and allows access for cleaning (e.g., grating with catch basin); or

2. Roll-out mat that is at least 6 feet (1.8 meters) long and will be maintained on a weekly basis by a contracted service.

107.2 Prohibited materials. The use of the following materials shall be prohibited:

1. Asbestos-containing materials

2. Urea-formaldehyde foam insulation

107.3 Pollutant source control products or material selection. At least two types of the materials must be used from the following,

and must comply with at least one of the Sections of this standard that are listed below:

1. Wood materials Section 901.4

2. Cabinets Section 901.5

3. Floor materials Section 901.7

4. Wall coverings Section 901.8

5. Interior architectural coatings Section 901.9

6. Interior adhesives and sealants Section 901.10

7. Insulation Section 901.11

107.4 Fireplaces and appliances. Where located within buildings, fireplaces, solid fuel-burning appliances, vented decorative gas

appliances, vented gas fireplace heaters and decorative gas appliances for installation in fireplaces shall comply with Sections 107.4.1 through 107.4.5.

107.4.1 Venting and combustion air. Fireplaces and fuel-burning appliances shall be vented to the outdoors and shall be provided

with combustion air provided from the outdoors in accordance with the International Mechanical Code and the International Fuel Gas Code. Solid-fuel-burning fireplaces shall be provided with a means to tightly close off the chimney flue and combustion air openings when the fireplace is not in use.

107.4.2 Wood-fired appliances. Wood stoves and wood-burning fireplace inserts shall be listed and, additionally, shall be labeled in

accordance with these requirements.

1. Site-built masonry wood-burning fireplaces use outside combustion air and include a means of sealing the flue and the combustion air outlets to minimize interior air (heat) loss when not in operation.

2. Factory-built, wood-burning fireplaces are in accordance with the certification requirements of UL 127.

3. Wood stove and fireplace inserts, as defined in UL 1482 Section 3.8, are in accordance with the certification requirements of UL 1482.


107.4.3 Biomass appliances. Biomass fireplaces, stoves and inserts shall be listed and labeled in accordance with ASTM E 1509 or

UL 1482. Biomass furnaces shall be listed and labeled in accordance with CSA B366.1 or UL 391. Biomass boilers shall be listed and labeled in accordance with CSA B366.1 or UL 2523.

107.4.4 Gas-fireplaces. Gas-fired fireplaces and direct heating equipment is listed and is installed in accordance with the NFPA 54,

ICC IFGC, or the applicable local gas appliance installation code. Gas-fired fireplaces within dwelling units and direct heating equipment are vented to the outdoors. 107.4.5 Unvented. Unvented room heaters and unvented decorative appliances, including alcohol burning, shall be prohibited. 107.5 Protection of HVAC system openings. HVAC supply and return duct and equipment openings shall be protected during dust-

producing operations of construction.

107.6 Garages. Attached garages are in accordance with the following:

1. Doors installed in the common wall between the attached garage and conditioned space are tightly sealed and gasketed. 2. A continuous air barrier is provided separating the garage space from the conditioned spaces.

107.7 Spot Ventilation. Exhaust systems shall be provided in accordance with Chapter 5 of the ICC IMC or ASHRAE 62.1. 107.8 Building Ventilation Systems. 107.8.1 Building Ventilation. Ventilation shall be provided to non-residential spaces in accordance with Chapter 4 of the ICC IMC or

ASHRAE 62.1. 107.8.2 Air filters. Air filters with a minimum MERV rating of 6 are installed on central forced air systems and are accessible.

107.9 Radon system. [SAME AS RESIDENTIAL SECTION]

107.9 Radon testing. Section x shall apply to radon zone 1 as defined in Figure 9(1).

Exceptions: Section x shall not be required where the authority having jurisdiction has defined the radon zone as Zone 2 or 3. Section x shall not be required where the occupied has no ground contact.

Radon testing shall be performed as specified in (a) though (j). This section does not require a specific test result, rather it requires the test be performed and the results provided to the registered design professional or owner.

(a) Testing is performed after the building meets its air tightness requirements.

(b) If there is a radon control system, testing is performed after the radon control system installation is complete. If the system has an active fan the building shall be tested with the fan operating.

(c) Testing is performed at the lowest level that will be occupied, even if the space is not finished. Spaces that are physically separated and severed by different HVAC systems shall be tested separately.

Exception- Section x shall not be required where the occupied space has no ground contact.

(d) Testing is not performed in a closet, hallway, stairway, laundry room, furnace room, bathroom or kitchen.

(e) Testing is performed with a commercially available test kit or with a continuous radon monitor that can be calibrated. Testing with test kits shall include two tests, which are averaged. Testing shall be in accordance with the testing device manufacturer's instructions.

(f) Testing shall be performed by the builder, a registered design professional or approved third party.

(g) Testing shall extend at least 48 hours or to the minimum specified by the testing device manufacturer, which ever is longer. This initial testing shall be permitted to extend past occupancy.

(h) Test results shall be provided directly to the owner by the test lab or testing party. The test results shall be delivered before or after occupancy.

(i) An additional pre-paid test kit shall be provided to the owner to use when they choose. The test kit shall include mailing, or emailing the results from the testing lab to the owner. The builder shall also be permitted to receive the test results.

(j) The registered design professional or owner shall be informed prior to occupancy and in writing that "A radon test result of 4 pCi/L or above is the ‘action level' set by EPA. EPA recommends radon reduction measures to lower radon levels below 4 pCi/L." Or "For a radon test result of 4 pCi/L or above [name of builder or jurisdiction having authority] recommends radon reduction measures to lower radon levels below 4 pCi/L."

108 Operation, maintenance, and building owner education 108.1 OPERATION AND MAINTENANCE MANUALS FOR TENANTS. Manuals are provided to the initial tenants of the non-

residential space regarding the operation, and maintenance of the building. Paper or digital format manuals are to include information


regarding those aspects of the building’s maintenance, and operation that are within the area of responsibilities of the respective tenant. One or more responsible parties are to receive a copy of all documentation for archival purposes.

1) A narrative detailing the importance of operating in a green building. This narrative is included in all responsible parties’ manuals.

2) A list of practices to conserve water and energy which require maintenance. 3) Information on opportunities to purchase renewable energy from local utilities or national green power providers. 4) Information on local and on-site recycling and hazardous waste disposal programs. 5) Local public transportation options for employees. 7) Information on organic pest control and green cleaning products.

108.2 TENANT FINISH_OUT MANUAL. Manuals are provided to the tenants of the non-residential space prior to the start of

construction regarding the design and construction of the non-residential portion of the building. Paper or digital format manuals are to include information regarding those aspects of the design and construction that are within the area of responsibilities of the respective tenant. One or more responsible parties are to receive a copy of all documentation for archival purposes.

1) Provisions of this Chapter verified at the time of building Certification for the respective space that shall be maintained as part

of the Tenant Finish Out.

2) Provisions of this Chapter NOT verified at the time of building Certification for the respective space that shall be included in

the Tenant Finish Out Construction Documents.

3) A list of minimum green building material specifications that are to be included in the Tenant Finish Out Construction

Documents based on the materials that were installed in the residential portion of the building.


P538 – Whole Dwelling Ventilation

SECTION 202 DEFINITIONS

ADD Definition

VENTILATION AIR. That portion of supply air that comes from the outside (outdoors), plus any recirculated

air that has been treated to maintain the desired quality of air within a designation space.

BALANCED AIR VENTILATION SYSTEM. two or more fans that simultaneously supply outdoor air and

exhaust air at substantially equal rates such that both the total supply and total exhaust flow rates meet the

required fan flow rate.

902.2 Building ventilation systems

902.2.1 One of the following whole building dwelling ventilation systems is implemented and is in accordance

with the specifications of Appendix B and an explanation of the operation and importance of the ventilation

system is included in either 1001.1 or 1002.2. Mandatory where the maximum air infiltration rate is less

than 5.0 ACH50

(1) exhaust air ventilation system equipped with outdoor air ducts and/or intake(s) for ventilation air 1

(2) exhaust air ventilation system equipped with outdoor air ducts and/or intake(s) for ventilation air and

with automatic ventilation controls to limit ventilation air during periods of extreme temperature, extreme

humidity and/or during times of peak utility loads. 3

(3) Supply air ventilation system 3


periods of extreme temperature, extreme humidity and/or during times of peak utility loads 5


with the manufacturer’s guidelines so as to not introduce polluted air back into the building 6

(6) heat-recovery ventilator 7 8


limit ventilation air during periods of extreme temperature, extreme humidity and/or during times of peak utility

loads, and with intakes located in accordance with the manufacturer's guidelines so as to not introduce polluted

air back in to the building 8 7

(8) energy-recovery ventilator 8 9

11.902.2 Building ventilation systems

11.902.2.1 One of the following whole building dwelling ventilation systems is implemented and is in

accordance with the specifications of Appendix B and an explanation of the operation and importance of the

ventilation system is included in either 11.1001.1 or 11.1002.2. Mandatory where the maximum air

infiltration rate is less than 5.0 ACH50

(1) exhaust air ventilation system equipped with outdoor air ducts and intake(s) for ventilation air 1


(2) exhaust air ventilation system equipped with outdoor air ducts and intake(s) for ventilation air and with

automatic ventilation controls to limit ventilation air during periods of extreme temperature, extreme humidity

and/or during times of peak utility loads. 3

(3) Supply air ventilation system 3


periods of extreme temperature, extreme humidity and/or during times of peak utility loads 5


with the manufacturer’s guidelines so as to not introduce polluted air back into the building 6

(6) heat-recovery ventilator 7


limit ventilation air during periods of extreme temperature, extreme humidity and/or during times of peak utility

loads, and with intakes located in accordance with the manufacturer's guidelines so as to not introduce polluted

air back in to the building 8

(8) energy-recovery ventilator 8

APPENDIX B

WHOLE DWELLING VENTILATION SYSTEM SPECIFICATIONS

B100

SCOPE AND APPLICABILITY

B101.1 Applicability of Appendix B. Appendix B is part of this Standard.

B101.2 Scope. The provisions contained in Appendix B provide the specifications necessary for complying with

Section 902.2.1 for the installation of whole dwelling ventilation systems. To receive points for implementing

Practice 902.2.1 or 11.902.1, the chosen whole dwelling ventilation system is to be in accordance with the

applicable specifications of Appendix B.

Exceptions:

Whole-dwelling ventilation systems complying with ASHRAE 62.2-2016, Ventilation and Acceptable

Indoor Air Quality in Residential, Sections 4 (except 4.3), 6 (except 6.3-6.6), 7 (except 7.2) and Appendix C

shall also be deemed in compliance with Appendix B.

Multifamily buildings four or more stories in height complying with ICC IMC Section 403 shall also be

deemed in compliance with Appendix B.

B101.3 Acknowledgment. Portions of the text of Appendix B, Section B200 and related Tables are extracted

from ICC IRC and ,ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers,

Inc.) Standard 62.2 Ventilation and Acceptable Indoor Air Quality in Residential Buildings, Section 4, and is

used with the permission of ICC and ASHRAE. The referenced Section and Table numbers within the extracted

text are modified to be applicable to Appendix B of this Standard. “*” indicates added reference to ICC or

ASHRAE 62.2 to provide clarity.

B200

WHOLE-BUILDING VENTILATION


B201.1 Mechanical Ventilation Rate. A whole-dwelling mechanical ventilation system shall provide outdoor air

at a continuous rate of not less than that determined in accordance with Tables B201.1a and B201.1b or,

equivalently, Equations B201.1a and B201.1b, based on the floor area of the conditioned space and number of

bedrooms.

Exceptions: The whole-dwelling mechanical ventilation system is permitted to operate intermittently

where the system has controls that enable operation for not less than 25-percent of each 4-hour segment and the

average ventilation rate during each 4-hour segment meets or exceeds the continuous ventilation rate prescribed

in Tables B201.1(1a) and B201.1(1b) or, equivalently, Equations B201.1a and B201:

B201.1.1 Different Occupant Density. Tables B201.1a and B201.1b and Equations B201.1a and B201.1b

assume two persons in a studio or one-bedroom dwelling unit and an additional person for each additional

bedroom. Where higher occupant densities are known, the rate shall be increased by 7.5 cfm (3.5 L/s) for each

additional person. When approved by the authority having jurisdiction, lower occupant densities may be used.

B201.1.2 Alternative Ventilation. Other methods may be used to provide the required ventilation rates (of

Tables B201.1a and B201.1b) when approved by a licensed design professional.

Equation B201.1a

Q_fan=0.01A_floor +7.5(N_br+1)

where

Q_fan = fan flow rate, cfm

A_floor = floor area, ft2

N_br = number of bedrooms; not to be less than one

Equation B201.1b

Q_fan=0.05A_floor +3.5(N_br+1)

where

Q_fan = fan flow rate, L/s

A_floor = floor area, m2

N_br = number of bedrooms; not to be less than one

TABLE B201.1a (I-P)

Ventilation Air Requirements, cfm

Floor Area Bedrooms

(ft2) 0–1 2–3 4–5 6–7 >7

<1500 30 45 60 75 90

1501–3000 45 60 75 90 105

3001–4500 60 75 90 105 120

4501–6000 75 90 105 120 135

6001–7500 90 105 120 135 150

>7500 105 120 135 150 165

TABLE B201.1b (SI)


Ventilation Air Requirements, L/s

Floor Area Bedrooms

(m2) 0–1 2–3 4–5 6–7 >7

<139 14 21 28 35 42

139.1–279 21 28 35 42 50

279.1–418 28 35 42 50 57

418.1–557 35 42 50 57 64

557.1–697 42 50 57 64 71

>697 50 57 64 71 78

B201.1.3 Reduced Minimum Ventilation Requirement. The minimum continuous ventilation rate shall be

reduced by 25%, provided the following criteria are met:

1) a ducted system supplies ventilation air directly to each bedroom and the largest common area.

2) not less than 70% of the whole building air volume is recirculated each hour. For intermittent systems, an

equivalent mixing is provided over a four-hour period.

3) the whole-dwelling ventilation is provided by a balanced ventilation system.

4) the fans providing supply ventilation air and exhaust ventilation air shall be interlocked or communicate in

such a way that they turn on/off concurrently.

B201.2 System Type. The whole-dwelling ventilation system shall consist of one or more supply or exhaust

fans and associated ducts and controls. Local exhaust fans shall be permitted to be part of a mechanical exhaust

system. Outdoor air ducts connected to the return side of an air handler shall be permitted as supply ventilation

if manufacturers’ requirements for return air temperature are met.

B201.3 Ventilation Airflow Measurement. The airflow required by this section is the quantity of outdoor

ventilation air supplied and/or indoor air exhausted by the ventilation system as installed and shall be measured

in accordance with Section 5 of RESNET/ICC 380 or other approved method.

B201.4 Restrictions on System Type. Use of certain ventilation strategies is restricted as follows.

B201.4.1 Exhaust Air Ventilation Systems. Exhaust air ventilation systems must specify how outside air is

delivered at the flow rate required. Systems that rely on ventilation air through the building envelope or

ventilation air from multifamily common areas, adjacent dwelling units, attics, basements, etc. are prohibited.